Microscopic DC-TDHF study of heavy-ion potentials and fusion cross sections

TL;DR

This paper employs the microscopic DC-TDHF method to analyze heavy-ion fusion reactions near the Coulomb barrier, providing new insights into fusion cross-sections for neutron-rich systems and neutron star crust composition.

Contribution

It introduces detailed microscopic calculations for heavy-ion fusion, including new results for $^{132}$Sn+$^{40}$Ca and comparisons with experimental data, advancing understanding of neutron-rich fusion processes.

Findings

Fusion cross-sections match experimental data well.

New results for $^{132}$Sn+$^{40}$Ca system.

Insights into neutron star crust heating.

Abstract

We study heavy-ion fusion reactions at energies near the Coulomb barrier, in particular with neutron-rich radioactive ion beams. Dynamic microscopic calculations are carried out on a three-dimensional lattice using the Density-Constrained Time-Dependent Hartree-Fock (DC-TDHF) method. New results are presented for the $^{132}$Sn+$^{40}$Ca system which are compared to $^{132}$Sn+$^{48}$Ca studied earlier. Our theoretical fusion cross-sections agree surprisingly well with recent data measured at HRIBF. We also study the near- and sub-barrier fusion of $^{24,16}$O on $^{12}$C which is important to determine the composition and heating of the crust of accreting neutron stars.